$99.00 $89.10

Hot Swappable Wireless/Wired Numpad DIY Kit

  • Hotswap PCB, compatible with Cherry Switch/Gateron Switch/Kailh BOX Switch, etc
  • RGB SMD light, multiple light effects
  • Detachable USB type-c cable
  • Bluetooth 5.1 wireless/wired dual mode
  • CNC aluminum case
Color :
Terms of Service

Free standard shipping to most countries

Enjoy free tax and duty paid to most countries*. Please refer to our shipping FAQ to see if you apply.

Covid-19 Shipping Delay Notice

Shipping may be delayed due to covid-19 depending on your country regulations.

21 Keys Hotswap Numpad Kit

GK21S custom kit is equipped with hot swappable terminals, with which you could install the switches directly without soldering. It’s compatible with Cherry MX switches, Kailh switches and Gateron switches and any 3 pins or 5 pins switches. You can easily build up your own mechanical numpad with this kit.

Bluetooth 5.1 Wireless and Wired Dual Mode

This kit is a Bluetooth module equipped with a large 750mAh capacity battery, certificated by UL. This kit adopts Broadcom Bluetooth chip. You can long press Fn+7/8/9 to connect Bluetooth with your device. With the latest Bluetooth 5.1 technology, you can enjoy fast response, low latency, lossless transmission. Make your numpad limitless to anywhere anytime.

16.8 Million Types RGB Backlight

Features RGB lighting with 16.8 million LED colors, rhythm, and sound lighting combinations, with additional key-programming and macro-creation for three definable layers. With 16.8 million colors in RGB lights, you can download additional lighting effects to the library and easily use them through the lighting effects driver. Simply connect the keyboard using the USB cable to access effects and software updates. Our database is constantly updating with different lighting effects. Enjoy a more immersive and colorful typing and gaming experience. RGB is such a cool element while playing games.

3 Fn Macros Customization

Custom is not just a word. We make it true. Here you have more than 6 driver settings. Simply download the driver and you will be able to program the backlight and macro settings, FN1/FN2/FN3 three layers program modes are available for any needs. Built-in flash memory can save the setting at offline mode, never afraid of losing it.

CNC Aluminum Base Frame

The GK21S was designed to be a mobile and compact device for any setting. The lightweight body is constructed from precision CNC aluminum to maximize durability and tactile satisfaction. This material build to provide a stable and firm foundation, no matter how hard you type. The full aluminum case is a more premium feature that is hard sought after by mechanical keyboard communities. Championed over plastic frames, mechanical keyboard enthusiasts have always loved the aluminum body for its durability, as well as the distinct tactile feel and sound that no plastic body can reproduce. The frames were designed with a low profile for a streamlined look that complements any setup.

Bluetooth Connecting Guide

  • Long press Fn+7/8/9 to connect with your device
  • The standby time is around 10 days if you use it without led, if you use it with leds,it last around 2-4 days.The battery will automatically charge when you insert USB to PC or when the battery is under 90%.
  • Tips for Installing the Switches

  • While installing switches, please vertically put it above the PCB. If you can’t plug it in, check whether the pins are bent instead of pushing it forcefully.
  • Driver download link: https://epomaker.com/pages/support

    • CNC Aluminum Case
    • Hot Swap PCB
    • USB Cable
    • Feet + Stabilizers + Fiber Plate +Switch Removal Tool 
    • 750mAh volume battery
    • Numpad Bag

    Customer Reviews

    Based on 3 reviews
    Caveat Emptor

    I purchased this product for it's lengthy feature list. When it arrived at my house and I opened it I was shocked at how solid this felt in my hand. So well built! It's cnc case is elegant and truly top quality.

    The physical perspective aside we move into the software/documentation realm. Imagine if you will having to cross a park (to get to the other side) barefoot. After taking your first few steps you discover a plethora of used syringe needles that you are walking on. This my friends is an accurate description of the downloadable software AND the included "documentation". The software has a graphical user interface that strongly reminds me of a completely disjointed version of Windows 3.0. In order for this software to function, one must attend at least 6 years of higher education and even then.....

    Documentation is equally written with the finesse of an angry bull in crystal shop. I don't need to critique this much as you should be able to see what I am talking about somewhere in this web site.

    Overall would I buy this again or recommend this to an actual friend? Yes, so long as we would be able to get some help. I had to go to YouTube for actual assistance. Can you believe that? Anyway, this company tried to help but they're in China and I am very far away. So, they're trying I think. (Epomaker I mean).

    Houssam Eltouny
    Amazing Num/Macro pad

    It is a really solid build, 1 solid CNC case and the battery last long for my usage, works with any 3/5 pin switches in the market.

    Needs keycaps

    Where can I get keycaps for this keypad? It matches my GK68XS perfectly, But I can't find keycaps for it. Five stars if I can find keycaps.


    Shipping & Handling

    Which countries do you ship to?

    We are generally able to ship to most countries via DHL Express, and many countries via Standard Shipping. You may clarify with our team to see whether Standard Shipping is available to your country.

    Note: For the country of UK, India and Russia, we can only do Standard Shipping. For countries of Africa, Argentina, Hawaii, Kuwait, Mauritius, Montenegro and Sri Lanka, to name a few, we can only do Express Shipping. Click here to read our Shipping Policy.

    How much does shipping cost?

    We have two shipping methods - Standard Shipping and Express Shipping.

    Standard Shipping Is free for most countries/areas.

    Express Shipping via DHL Express is 10-40USD depending on your country. If your order is over 500USD, DHL Express Shipping is free*.

    *The GK96S, SK96S, AK84S and NT68 are exceptions for free shipping.

    Shipping fees exclude import taxes or processing fees that might be applicable for your country. Epomaker is not responsible for any form of such fees.

    How long does it take to receive the order after it is placed?

    For in-stock products, your order will be shipped within 3 working days. Customized items will take a longer time (do check in with our staff for more information). On normal non-sale days, once your parcel is shipped:

    • For Standard Shipping, it takes about 2-3 weeks for items to be delivered after it is shipped. For some countries, it might take up to 2-3 months, depending on your country and its custom procedure. The duration for transit is beyond our control. Epomaker does not arrange refunds for such cases. Please consider an upgrade to DHL Express or keep the waiting time in mind.
    • For Express Shipping, it takes about 3-7 days for items to be delivered after shipping out.

    *Note: Shipping period might be affected due to festive seasons or other unforeseen circumstances.

    Warranty & Returns

    7-Day Return Policy

    On the ground of disliking a product, you may return any non-customized and non-sales product that is sealed, within the 7 days upon receiving it. To be eligible for a return, your item must be unused and in the same condition that you received it. It also must be in the original packaging.

    Customized and sales products, accessories, or spare parts are excluded from the 7-day return policy. The shipping fee, handling fees, or any form of tax caused by return will NOT be refunded. Additionally, a restocking fee (35% of the item’s retail value) will be charged under this circumstance... Click here to read our full return policy.

    1 Year Warranty

    Epomaker offers a 1-year warranty for keyboards and DIY kits, and offers a 6-month warranty for keycap sets and cases (e.g the case-only product sold separately). Batteries will be covered by the 3-month warranty. Accessories such as keycap pullers, switch pullers, free spare keycaps, cables etc., are excluded from the warranty. To claim for a warranty or confirm whether your product is eligible for return/warranty, please kindly contact us via support@epomaker.com.

    The warranty does not extend to any product whose serial number has been defaced or altered, just as the warranty will cease if you make modifications in the software not authorized by Epomaker. Click here to read our full Warranty Policy.

    48 Working Hours response to Support Inqueries.

    For items that are damaged, incorrect, or faulty upon delivery, you must contact support@epomaker.com within 7 days upon delivery. You need to provide any solid proof of the problem you come across. Epomaker will help you identify the problem, and may cover the shipping cost according to the agreed amount. Please kindly note that a shipping fee that is extremely higher than the 15% of product value is non-refundable. The shipping fee won’t be refunded if the product is not with any manufacturer defects.

    Product Questions

    How to choose different switch options?

    To choose the suitable switch, it depends on the scenario you use the keyboard and your preference on the typing experience. Here is our helpful guide for your reference: View our Switch Selection Guide

    Where can I find the manual/software/driver for my item?

    For manuals and software, you may find it in this link: software downloads page

    Are there any keyboard with layouts other than ANSI (US Layout)?

    As the ANSI is one of the most popular layouts around the world, our keyboards are following this trend for now. For other layouts, we will try our best to make them available on our website in the future.

    I want to make myself a DIY keyboard. Where can I find some help?

    You may join our Discord to ask for assistance: Click here to Join

      You have successfully subscribed!
      This email has been registered